69142812479 has 4 divisors (see below), whose sum is σ = 74461490376. Its totient is φ = 63824134584.

The previous prime is 69142812421. The next prime is 69142812493. The reversal of 69142812479 is 97421824196.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 69142812479 - 2⁸ = 69142812223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69142812479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69142814479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2659338929 + ... + 2659338954.

It is an arithmetic number, because the mean of its divisors is an integer number (18615372594).

Almost surely, 2^69142812479 is an apocalyptic number.

69142812479 is a deficient number, since it is larger than the sum of its proper divisors (5318677897).

69142812479 is a wasteful number, since it uses less digits than its factorization.

69142812479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318677896.

The product of its digits is 1741824, while the sum is 53.

The spelling of 69142812479 in words is "sixty-nine billion, one hundred forty-two million, eight hundred twelve thousand, four hundred seventy-nine".